US290928A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Gas-purifier
Assignee: —
•
Filing: —
•
Granted: 1883-12-25
•
Expires: 1900-12-25
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 06:51
CPC Classifications
B; B01; B01D; B01D46/00; B01D46/0002; B01D46/0005; B01D46/0009; B01D53/00; B01D53/02; B01D53/06; B01D53/10; B01D2253/00; B01D2253/10; B01D2253/102
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1886-12-24 | 1887-06-25 | 1887-12-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1890-12-24 | 1891-06-25 | 1891-12-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1894-12-24 | 1895-06-25 | 1895-12-25 | $7700.00 | Window Closed / Lapsed |